Blair will offer a short introduction to the vast array of inexpensive, easy-to-use ‘open source hardware’ and open source software that can be employed in K-12 education, academic research labs, and in environmental monitoring. Examples will include simple ways of measuring temperature, pressure, and humidity using the Arduino and Raspberry Pi electronics platforms. He will also provide an overview of the work of Public Laboratory and the use of kite and balloon aerial imagery, do-it-yourself spectroscopy, and near-infrared photography in citizen science.